I stopped taking the birth control pill 3 months ago and since then my periods have been completely irregular and I''ve had unprotected sex. How can I know if I''m pregnant or when my period might come?

It may take some months for your cycle to return to its normal ''pre-pill'' routine after stopping the pill. If you think you might be pregnant, do a pregnancy test. The only way to know if you''re ovulating is to do a home urine ovulation kit. It is probably simpler, however, just to wait a couple of months for your periods to re-establish.